package com.jnsw.testkotlin.utils;

import java.security.MessageDigest;

/**
 * MD5 加密类
 * 
 * @author Administrator
 * 
 */
public class MD5 {
	public MD5() {
	}

	/**
	 * Computes the MD5 fingerprint of a string.
	 * 
	 * @return the MD5 digest of the input <code>String</code>
	 */
	public static String compute(String inStr) {

		MessageDigest md5 = null;
		try {
			md5 = MessageDigest.getInstance("MD5");
		} catch (Exception e) {
			System.out.println(e.toString());
			e.printStackTrace();
			return "";
		}
		char[] charArray = inStr.toCharArray();
		byte[] byteArray = new byte[charArray.length];

		for (int i = 0; i < charArray.length; i++) {
			byteArray[i] = (byte) charArray[i];
		}

		byte[] md5Bytes = md5.digest(byteArray);

		StringBuffer hexValue = new StringBuffer();

		for (int i = 0; i < md5Bytes.length; i++) {
			int val = ((int) md5Bytes[i]) & 0xff;
			if (val < 16) {
				hexValue.append("0");
			}
			hexValue.append(Integer.toHexString(val));
		}

		return hexValue.toString();
	}
}
